Window-sash lock.



T. L. MORTIMER.

WINDOW SASH LOGK.

APPLICATION FILED Mime, 1913.

Patented Apr. 29, 1913.

Thomas LMorlLmer.

ON. I). L.

COLUMBIA I'LANOGRAIH co.. WASHINGT WINDOW-SASH LOCK.

Specification of Letters Patent.

Patented Apr. 29, 1913.

Application filed March 6, 1913. Serial No. 752,270.

To all whom it may concern:

Be it known that I, THOMAS L. MORTI- MER, a citizen of the UnitedStates, and residing at New York, in the county of New York and State ofNew York, have invented certain new and useful Improvements inWindow-Sash Locks, of which the following is a specification, such aswill enable those skilled in the art to which it appertains to make anduse the same.

This invention relates to window sash locks, and the object thereof isto provide an improved device of this class which is simple inconstruction and comparatively inexpensive, and which may be easilyapplied and by means of which the sashes may be locked in a closedposition or in any desired position of adjustment for ventilation orother purposes.

The inventionis fully disclosed in the following specification, of whichthe accompanying drawing forms a part, in which the separate parts of myimprovement are designated by suitable reference characters in each ofthe views, and in which Figure 1 is an inside view of one side of awindow frame and showing the bottom part of the top sash and the toppart of the bottom sash in transverse section and showing my improvedsash lock in position for use; Fig. 2 a section on the line 2-2 of Fig.1; and Fig. 3 a section on the line 33 of Fig. 1.

In the accompanying drawing I have shown at a one side of a windowframe, at b the bottom rail of the top sash and at c the top rail of thebottom sash, and my improved sash lock d is, in practice, as shown inthe drawing, placed between one side 5 of the top sash and the frontbead strip 6 which holds the bottom sash in position.

My improved sash lock comprises a pair of lazy-tongs composed of topmembers (Z and bottom members 0F, and the opposite end portions of whichare pivoted together at d, and the separate parts of said members arepivoted together at of". The sash lock is provided at its opposite sideswith shoes f and f adapted to bear respectively on the side 6 of the topsash and on the bead strip e, and these shoes are held in place by thepivot pins at d as clearly shown in Figs. 1 and 8. I also provide avertically arranged plate 9 having a longitudinal slot 9 and provided,in the form of construction shown, with a foot piece 9 adapted to reston the top bar 0 of the bottom sash and the bottom pivot pin d of thelazy-tongs is passed through the bottom part of the plate 9, and the toppivot pin d is passed through the slot 9 as clearly shown in Figs. 1 and2, and provided with a thumb nut b.

In the use of this device it is preferably secured to the top bar 0 ofthe bottom sash at one side thereof and between the side 6 of the topsash and the front bead strip e as shown, and this connection may bemade by a screw '5 passed through the foot piece 9 if desired, or in anyother way, and whenever it is desired to lock the sashes the thumb nut his loosened and the top pivot pin (Z forced downwardly in the slot 9 soas to press the shoes f and f firmly into operative position, afterwhich the thumb nut 2 is tightened. This will result in locking thesashes in position and if desired the shoes f and f may be provided withserrated bearing surfaces to facilitate this operation. It will also beunderstood that the sashes may be opened, or the top sash lowered andthe bottom sash raised for ventilation purposes, and the sash lockoperated, as above described, for securing the sashes against'movement.It will also be understood that one of my improved sash locks may beused at each side of the window, if desired, and changes in andmodications of the construction herein described may be made, within thescope of the appended claims, without departing from the spirit of myinvention or sacrificing its advantages.

Having fully described my invention, what I claim as new and desire tosecure by Letters Patent, is

1. A window sash lock, comprising a slotted plate and apair oflazy-tongs comprising top and bottom members, said lazvtongs beingprovided at their opposite sides with bearing shoes and the bottomportion thereof being pivoted to said plate and the top portion thereofbeing provided with a pivot pin which is passed through the slot in saidplate and provided with a clamp nut.

2. A window sash lock involving a pair of lazy-tongs composed of top andbottom members, said sash lock being adapted to as my invention I havesigned my name in be placed in a side of the Window frame and presenceof the subscribing Witnesses this to bear on the bottom sash, a side ofthe top 4th day of March 1913.

sash and the front bead strip, and means THOMAS L. MORTIMER. 5 foropening and closing said lazy-tongs and Witnesses:

locking them in any desired position. G. MULREANY, In testimony that Iclaim the foregoing S. ANDREWS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

